Single pulley with 50-mm molded-plastic wheel for experiments and demonstrations involving simple machines and force, for classroom use

Steel hooks at each end for hanging

Brass axles with wide hubs for free running

Description:

Each single pulley has a 50-mm molded-plastic wheel and is designed for classroom experiments and demonstrations involving simple machines and force. The pulley has steel hooks at each end for hanging the pulley, and brass axles and wide hubs for free running. Set of 5.

5 Stars By OomPahPah on 2013-11-16 Mechanical Advantage These are very nice pulleys, with low friction and moderate wobble. The frames are sturdy. They work with strings or cords up to a little over 4mm diameter, and appear capable of at least 10 lb loads. Cords of 3mm diameter or more cannot "jump" off the pulleys and jam, as sometimes happens with cruder hardware type pulleys. Although these are intended for classroom and demonstration purposes, I found them very useful for practical "block and tackle" light duty applications, particularly since they feature hooks on both ends. They are not as good as ball-bearing pulleys, but for the price are hard to beat. I'll use them again.

4 Stars By Miss. Y. on 2014-09-08 Great for small homeschool projects! These pulleys are a good value for your homeschool student. These are available to our children with our open science supplies. But, these items are only appropriate for small scale experimentation. Wheel grooves aren't deep enough to handle lifting with thin ripe.

3 Stars By Frank D Roosevelt on 2013-11-17 Jamb easily - ok for the price The rope tends to jump off the pulley fairly easily and often. Rope less than about 3/16 inch in diameter will jamb between the pulley and the frame when this happens.

The pulleys have held up well so far under loads of several pounds.

Worked well for an elementary school science fair. Not bad for the price.

4 Stars By K. Fontaine on 2016-11-27 I used it to hold a 1200 gram piñata with â…œ in paranoid and it worked just fine. Okay for lightweight use-- though you have to remember to feed the string through before it is secured at both ends. I used it to hold a 1200 gram piñata with â…œ in paranoid and it worked just fine.